Controlling-valve for hydraulic oil-delivery systems.



F. e. FARR. CONTROLLING VALVE FOR HYDRAULI'C OIL DELIVERY SYSTEMS.

APPLlCATlON FILED OCT-3.1911- 1 286371; Patented Dec. 10, 1918.

Quoting! trolling-Valves for which avoids danger FREDERICK G. FAR 0F DETR'oIT,

CORPORATION, oE DETROIT,

CONTROLLING-VALVE ro nascmr To all whom it may concern:

Be it known that I, FREDERICK G. FARR, a citizen of the United States of America, residing at Detroit, in the county 'of Wayne and State of Iichigan, have invented certain new and useful Improvements in Con- Hydraulic Oil-Delivery Systems, of which the following is a specification, reference being had thereinvto the accompanying drawings.

The invention relates to systems for hy draulically delivering oil, and it is the obj ect of the invention to obtain a construction of discharge of the oil through leakage of the displacement liquid. It is a further object to obtain a simple construction by which a-single valve controls ilioth inlet and discharge of the displacement uid. y

In the drawings: I I

Figure 1 is a longitudinal section through the valve;

Fig. 2 is a diagram of the valve in connection with a hydraulic oil delivery system.

A is a conduit through which the displacement liquid is introduced and drawn 0E from the tank or receptacle, B is the water 0 supply pipe and C is the waste water discharge pipe. These pipes 'B and C are connected to the a valve D. This valve is provided with two disks E and F respectively controlling communication between the conduits B and C and a central chamber G-in the valve casing. H is a valves E and F, and I is an actuating lever for lifting said stem.

Normally the pressure of liquid in the conduit B is sufficient to hold the valve E to its seat and in this position the valve F is removed from its seat so as to open communication between the chamber G and the discharge conduit C. This discharge conduit is arranged to receive any leakage which may pass the valve E without permitting it to enter the conduit A. On the other hand, when the lever I is lifted the valve F will be forced to its seat, while be raised from its seat to admit liquid from. the conduit B into the chamber G. The

liquid thus admitted is compelled to pass into the conduit A, from which it passes into the tank and displaces the oil therefrom. With the construction described there is MICHIGAN, ASSIGNOR To MICHIGAN, A CORPORATION or MICHIGAN.

fluid. This has been a serious taln systems that have heretofore been used ver, valve stem and weight of the water pipe A through the medium of common stem connected to the the valve E willwill find STA PATENT OFFICE.

YDRAU LIC OIL SYSTEMS HYDRAULIC OIL-BELIVERY SYSTEMS no possibility of accidentally discharging 011 through leakage of the displacement defect in cerfor the reason that a small leak,'if it finds access to the tank, vwill gradually displace the oil and in time Waste. With my improvement whatever leakage may occur will fall directly into the discharge conduit 0 and therefore cannot find access to the conduit A.

It will be noted that the lever I passes through an aperture J in the valve D-into engagement with the stem H. This aperture J forms an air vent which will efl'ectually prevent siphonage of water from the conduit 0 into the conduit A. It will be further observed that the weight of the levalve is constantly opinlet valve E, and the against, said valves will operate in the same'direction. The whole construction is therefore one which will effectually prevent the accidental discharge of oil through any cause.

What I claim as my invention is:

-1. A-control valve, comprising a casing having a chamber therein with an inlet passage communicating with its upper'end, a" dischargepassage communicating laterally therewith and a waste passage communicaterating to close the ing with the lower end, valves for-controL ling the inlet and waste passages respecsaid lateral discharge passage, a common stem connecting said valves, and a lever for. actuating said stem to extending into said waste an aperture in said casing, said aperture also constituting a vent passage.

2. In. a hydraulic storage and delivery system, the combination with a tank, of a. valve casing, a pipe laterally communicating with said valve casing and extending to said tank for alternatively supplyin adisplacement fluid to said tank and de ivering it therefrom, and vertically alined supply and drain pipes for the displacement fluid in communication with said casing, and connected valves within said casing for alternatively closing communication therewith of said supply and drain pipes, whereby any leakage when the supply pipe valveis closed direct escape through said drain pipe.

Specification of Ietters Patent. Patef td Dec, 10, 1918, Application filed October 8,1917. Serial No. 195,310. I I i occasion a considerable operate the valves, 1 passage through 3. A control valve comprising a casing tion of said inlet and waste passages there- 1 having a chamber therein with an inlet paswith, and an operating lever for said means sage communicating witheits' upper end, a extending into said waste passage. through 10 discharge passage communicating laterally an aperture in saidcasing, said aperture also 5 therewith, and a waste passage communicate constituting a vent passage.

ing withthe lower end, means within said In testimony whereof I aflix my signature, casing for alternatively closing communica- FREDERICK Gr. FARR. 

